Cow-milker.



No. 700,749. Patented May 27, I902.

- F. M. DEVORE.

00W MILKEB.

(Application filed Feb. 3, 1902.)

(No Modal.)

.Iiiiil:

WITNESSES '7 //v VENTOI? M i 6 e I m: Norms PETERS 00,. FHOYO-LITHQ, WASHINGTON. n. c.

NTED STATES.

ATENT Fries.

FRANCIS M. DEVORE, OF THOMPSON, IOWA, ASSIGNOR TO HIMSELF, AND ALTA L. HOOVER, Oh WATERLOO, IOWA.

COW-MILKER.

SPECIFICATION forming part of Letters Patent 1\T0. 700,749, dated May 27, 1902. Application filed February 3,1902. Serial No. 92,437. (No model.)

To aZZ whom, it vnmy concern.-

Be it known that I, FRANCIS M. DEVORE, a citizen of the United States,residin g atThompson, in the county of Winnebago and State of Iowa, have invented certain new and useful Improvements in Oow-Milkers, of which the following is a specification.

This invention relates to improvements in cow-milkers; and the object of myinventionis to so improve the method of exhausting the air from the milk-receiver as to create a uniform tension therein and prevent pulsations. I effect this object by the means iilustrated in the accompanying drawings, in which- Figure 1 is a representation in perspective of a cow-milker equipped with my improvement, showing the various parts thereof in operative position and relation. Fig. 2 is a Vertical section of the air-tension-regulating chamber. Y

The vessel it stands intermediate between the air-pump Z, with which it communicates by means of the pipe 4', and the tension-regulating chamber h,with which it communicates by means of thepipe m. The air in the ves-,

communicating pipes, the regulator h, and

the vessel 70 by means of the action of the airpump Zwould be varying, according to the pulsations caused by the intermittent action of the pump. In order to obviate this varying tension and create in the teat-cups a a uniform tension, I have provided 'the accordion-shapedor collapsible regulating-box h with an air-valve y. This regulating-box is provided with perforated partitions s. The telescoping tubes t and p extend along the longitudinal axis of the box h, the tube 25 being fastened to one end of the box, passing through the partitions s, and telescoping within the tube 1). The larger tube 19 is fastened within the other end of the box Zz, one

end being closed and extending outside of the box. This outer end of the-tube 19 has openings w,-which are ordinarily closed'by means of a sliding plug-valve y, supplied with an expansive tension spring 61;. The smaller tube t is supplied with perforations u. The ends of the regulating-box h are connected to the upright sides of the casing g by means of'the springs 'Z- and 0. These springs are of a strength sufficient to afiord any desired counter tension to the pull on the ends of the box h, caused by exhaustion of the air therein. The tubes m and n are fixed,respectively, within opposite ends of the regulating-box h, are valveless, and communicate, respectively,

with the vessel Zr, and by means of the hose g, pipe Z, and hose f with the milk-receiver e.

The operation of the device is as follows: Through the means of the air-pump Z the air is partially exhausted from the vessel k, the boxh, and the milk-receiver e. As the air in the milk-receiver e approaches the proper degree of exhaustion the regulating-box h collapses by reason of its ends'being drawn tois-received-within the interior of the chamber h, reducing the tension therein to the proper degree. As the ends of the chamber 72 'recede from each other the tube t is drawn away from the valve y,and the latter is pushed forward through the action of the spring w and closes the inlets w. This manner of regulation results in doing away with nearly all of the pulsations or Varying tension in the milk-receiver e and teat-cup a caused by the intermittent action of the air-pump Z. It thus creates a uniform tension of the proper degree, which has been found to be desirable in practice, inasmuch as it has been'found that a tension of a varying degree -or a pulsatory suction results in drawing down the cows teats into the teat-cups to an extent which interferes with the flow of the milk and renders the animal restless. The uniform tension of a proper degree and without pulsation eifects a more nearly perfect Withdrawal of the milk with less distress to the animal.

My improvement is applicable as an intermediate regulating-chamber to any of the usual forms of cow-milking apparatus.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a cow-milker, the combination with a milk-receiver, a'n air-exhausting device, a collapsible tension-regulating chamber located intermediate said two elements, and tubular connections between the various elements; of tubes along the axial center of said chamber connected at their outer extremities with its ends and telescoping at their inner ends, the smaller tube being perforated within the chamber and the larger being perforated on its exterior, a plug-valve sliding within the larger tube, and means for pressing it normally inward so as to close the openings in this tube, the valve being pushed outward by the smaller tube when the chamber collapses.

2. In a cow-milker, the combination with a milk-receiver, an air-exhausting device, a collapsible tension-regulating chamber located intermediate said two elements, and tubular connections between the various elements; of a casing within which said chamber is located, springs connecting the ends of the easing with the ends of the chamber and tending to distend the latter, telescoping tubes within the chamber, the smaller being secured to one end and having perforations in its body and the larger passing through the other end and having perforations outside said chamber and its outer end closed, a sliding plug-valve within said larger tu be adapted to be pushed outward by the smaller tube when the chamber is collapsed, and an expansive spring between said plug and the closed outer end of the larger tube.

In testimony whereof I affix my signature in presence of two witnesses.

FRANCIS M. DEVORE.

Witnesses:

ALBERT SiiHnINc, N. E. ISAACS. 

